Flow Through Porous media

May 3, 2005, 10:39

Dear CFX users,

I am trying to simulate 2-D axis-symmetric flow (TWO-PHASE) through a 8mm thick perforated plate (model as a porous media) using CFX4.4. The volume porosity is 0.25. The plate has 360 holes (250mm diameter). I would like to know how to calculate the following terms for CFX 4.4 command file.

BODY FORCE, RESISTANCE CONSTANT and RESISTANCE SPEED FACTOR

Thanks for help Regards, Kumar

May 4, 2005, 08:14

Hi,

there are correlations and experimental results available. You could use a modified Ergun equation (which is for packed spheres given a specified porosity) or find something more appropriate in a reference such as:

Handbook of Hydraulic Resistance, Third Edition by Idelchik

regards,

Bak_Flow

May 4, 2005, 09:04

May 4, 2005, 09:05

Thank Bak_Flow I got the flow resistance for the plate K= 20(non dimensional) from Miller book, but I want the value for RESISTANCE CONSTANT (kg/m^3) and RESISTANCE SPEED FACTOR( kg/m^4).

Regards, Kumar

May 3, 2005, 10:39	Flow Through Porous media	#1
Kumar Guest Posts: n/a	Dear CFX users, I am trying to simulate 2-D axis-symmetric flow (TWO-PHASE) through a 8mm thick perforated plate (model as a porous media) using CFX4.4. The volume porosity is 0.25. The plate has 360 holes (250mm diameter). I would like to know how to calculate the following terms for CFX 4.4 command file. BODY FORCE, RESISTANCE CONSTANT and RESISTANCE SPEED FACTOR Thanks for help Regards, Kumar

May 4, 2005, 08:14	Re: Flow Through Porous media	#2
Bak_Flow Guest Posts: n/a	Hi, there are correlations and experimental results available. You could use a modified Ergun equation (which is for packed spheres given a specified porosity) or find something more appropriate in a reference such as: Handbook of Hydraulic Resistance, Third Edition by Idelchik regards, Bak_Flow

May 4, 2005, 09:04	Re: Flow Through Porous media	#3
Kumar Guest Posts: n/a

May 4, 2005, 09:05	Re: Flow Through Porous media	#4
Kumar Guest Posts: n/a	Thank Bak_Flow I got the flow resistance for the plate K= 20(non dimensional) from Miller book, but I want the value for RESISTANCE CONSTANT (kg/m^3) and RESISTANCE SPEED FACTOR( kg/m^4). Regards, Kumar

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